Lobe pump



FIG. 1 is a perspective view of the lobe pump;

FIG. 2 is a right side elevational view thereof;

FIG. 3 is a left side elevational view thereof;

FIG. 4 is a top side elevational view thereof;

FIG. 5 is a bottom side elevational view thereof;

FIG. 6 is a front elevational view thereof; and,

FIG. 7 is a back elevational view thereof. 

The ornamental design for a lobe pump, as is shown and described herein. 